B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/28 (2006.01) B05D 7/00 (2006.01) C08J 5/12 (2006.01) C08J 7/04 (2006.01) C08K 3/38 (2006.01) C09D 7/12 (2006.01) C09D 183/04 (2006.01)
Patent
CA 2455897
The present invention provides an improved multi-layer composite of two or more polymeric layers at least one of which is formed from a thermosetting composition. The composite includes at least a first polymeric layer formed on a substrate and a second polymeric layer over the first polymeric layer, wherein in the absence of a boron-containing compound, the first and second polymeric layers have poor interlayer adhesion. The improvement resides in the inclusion of at least one boron-containing compound in one or both of the first and second polymeric layers in an amount sufficient to improve the interlayer adhesion between the first and second polymeric layers. Also provided is an improved curable coating composition used to form a multi-layer composite coating of two or more cured coating layers, at least one of which is formed from the thermosetting composition. Related methods and coated substrates are also provided.
L'invention porte sur un composite multicouche amélioré revêtu d'au moins deux couches de polymère dont l'une au moins est faite d'une composition thermodurcissable. Ledit composite comporte au moins une première couche de polymère formée sur un substrat et une deuxième couche de polymère formée sur la première. En l'absence d'un composé contenant du bore, l'adhérence entre la première et la deuxième couche de polymère est réduite. L'amélioration consiste à introduire dans au moins l'une desdites couches un composé contenant du bore en quantité suffisante pour améliorer l'adhérence entre les couches. L'invention porte également sur une composition durcissable servant à former des revêtements composites multicouches de deux ou plus de deux couches dont l'une au moins est thermodurcissable. L'invention porte en outre sur les procédés et les substrats associés.
Anderson Lawrence G.
Burgman John W.
Hockswender Thomas R.
Morow Karen A.
Sadvary Richard J.
Borden Ladner Gervais Llp
Ppg Industries Ohio Inc.
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